Fil-blst requires libclang to build

[hyunmoon]

18c025f

This is a new requirement so I think it should be documented somewhere.

How to fix

Ubuntu:
apt-get install -y libclang-dev

   Compiling failure v0.1.8
error: failed to run custom build command for `fil-blst v0.1.1`

Caused by:
  process didn't exit successfully: `/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-9bd86e5e45b0c01d/build-script-build` (exit code: 101)
--- stdout
Using fil-blst source directory "fil-blst"
Using       blst source directory "blst"
TARGET = Some("x86_64-unknown-linux-gnu")
HOST = Some("x86_64-unknown-linux-gnu")
CC_x86_64-unknown-linux-gnu = None
CC_x86_64_unknown_linux_gnu = None
HOST_CC = None
CC = None
CFLAGS_x86_64-unknown-linux-gnu = None
CFLAGS_x86_64_unknown_linux_gnu = None
HOST_CFLAGS = None
CFLAGS = None
CRATE_CC_NO_DEFAULTS = None
DEBUG = Some("false")
CARGO_CFG_TARGET_FEATURE = Some("avx,avx2,fxsr,sha,sse,sse2,sse3,sse4.1,sse4.2,ssse3")
CC_x86_64-unknown-linux-gnu = None
CC_x86_64_unknown_linux_gnu = None
HOST_CC = None
CC = None
CFLAGS_x86_64-unknown-linux-gnu = None
CFLAGS_x86_64_unknown_linux_gnu = None
HOST_CFLAGS = None
CFLAGS = None
CRATE_CC_NO_DEFAULTS = None
CARGO_CFG_TARGET_FEATURE = Some("avx,avx2,fxsr,sha,sse,sse2,sse3,sse4.1,sse4.2,ssse3")
CC_x86_64-unknown-linux-gnu = None
CC_x86_64_unknown_linux_gnu = None
HOST_CC = None
CC = None
CFLAGS_x86_64-unknown-linux-gnu = None
CFLAGS_x86_64_unknown_linux_gnu = None
HOST_CFLAGS = None
CFLAGS = None
CRATE_CC_NO_DEFAULTS = None
CARGO_CFG_TARGET_FEATURE = Some("avx,avx2,fxsr,sha,sse,sse2,sse3,sse4.1,sse4.2,ssse3")
running: "cc" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-Wall" "-Wextra" "-mno-avx" "-Wno-unused-command-line-argument" "-D__ADX__" "-o" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/blst/src/server.o" "-c" "blst/src/server.c"
exit code: 0
running: "cc" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-Wall" "-Wextra" "-mno-avx" "-Wno-unused-command-line-argument" "-D__ADX__" "-o" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/blst/build/assembly.o" "-c" "blst/build/assembly.S"
exit code: 0
AR_x86_64-unknown-linux-gnu = None
AR_x86_64_unknown_linux_gnu = None
HOST_AR = None
AR = None
running: "ar" "crs" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/libblst.a" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/blst/src/server.o" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/blst/build/assembly.o"
exit code: 0
cargo:rustc-link-lib=static=blst
cargo:rustc-link-search=native=/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out
TARGET = Some("x86_64-unknown-linux-gnu")
HOST = Some("x86_64-unknown-linux-gnu")
CXX_x86_64-unknown-linux-gnu = None
CXX_x86_64_unknown_linux_gnu = None
HOST_CXX = None
CXX = None
CXXFLAGS_x86_64-unknown-linux-gnu = None
CXXFLAGS_x86_64_unknown_linux_gnu = None
HOST_CXXFLAGS = None
CXXFLAGS = None
CRATE_CC_NO_DEFAULTS = None
DEBUG = Some("false")
CARGO_CFG_TARGET_FEATURE = Some("avx,avx2,fxsr,sha,sse,sse2,sse3,sse4.1,sse4.2,ssse3")
CXX_x86_64-unknown-linux-gnu = None
CXX_x86_64_unknown_linux_gnu = None
HOST_CXX = None
CXX = None
CXXFLAGS_x86_64-unknown-linux-gnu = None
CXXFLAGS_x86_64_unknown_linux_gnu = None
HOST_CXXFLAGS = None
CXXFLAGS = None
CRATE_CC_NO_DEFAULTS = None
CARGO_CFG_TARGET_FEATURE = Some("avx,avx2,fxsr,sha,sse,sse2,sse3,sse4.1,sse4.2,ssse3")
CXX_x86_64-unknown-linux-gnu = None
CXX_x86_64_unknown_linux_gnu = None
HOST_CXX = None
CXX = None
CXXFLAGS_x86_64-unknown-linux-gnu = None
CXXFLAGS_x86_64_unknown_linux_gnu = None
HOST_CXXFLAGS = None
CXXFLAGS = None
CRATE_CC_NO_DEFAULTS = None
CARGO_CFG_TARGET_FEATURE = Some("avx,avx2,fxsr,sha,sse,sse2,sse3,sse4.1,sse4.2,ssse3")
running: "c++" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-I" "blst/bindings" "-Wall" "-Wextra" "-mno-avx" "-std=gnu++11" "-D__ADX__" "-o" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/fil-blst/fil_blst.o" "-c" "fil-blst/fil_blst.cpp"
exit code: 0
running: "c++" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-I" "blst/bindings" "-Wall" "-Wextra" "-mno-avx" "-std=gnu++11" "-D__ADX__" "-o" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/fil-blst/thread_pool.o" "-c" "fil-blst/thread_pool.cpp"
exit code: 0
AR_x86_64-unknown-linux-gnu = None
AR_x86_64_unknown_linux_gnu = None
HOST_AR = None
AR = None
running: "ar" "crs" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/libfilblst.a" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/fil-blst/fil_blst.o" "/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out/fil-blst/thread_pool.o"
exit code: 0
cargo:rustc-link-lib=static=filblst
cargo:rustc-link-search=native=/home/downloads/lotus/extern/filecoin-ffi/rust/target/release/build/fil-blst-910e419bf55388a4/out
CXXSTDLIB_x86_64-unknown-linux-gnu = None
CXXSTDLIB_x86_64_unknown_linux_gnu = None
HOST_CXXSTDLIB = None
CXXSTDLIB = None
cargo:rustc-link-lib=stdc++
cargo:warning=couldn't execute `llvm-config --prefix` (error: No such file or directory (os error 2))
cargo:warning=set the LLVM_CONFIG_PATH environment variable to the full path to a valid `llvm-config` executable (including the executable itself)

--- stderr
thread 'main' panicked at 'Unable to find libclang: "couldn\'t find any valid shared libraries matching: [\'libclang.so\', \'libclang-*.so\', \'libclang.so.*\', \'libclang-*.so.*\'], set the `LIBCLANG_PATH` environment variable to a path where one of these files can be found (invalid: [])"', /root/.cargo/registry/src/github.com-1ecc6299db9ec823/bindgen-0.54.0/src/lib.rs:1959:13
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

warning: build failed, waiting for other jobs to finish...
error: build failed
+ rm -f /home/tmp/tmp.hD9Cnz7578
make[1]: *** [Makefile:11: .install-filcrypto] Error 101
make[1]: Leaving directory '/home/downloads/lotus/extern/filecoin-ffi'
make: *** [Makefile:37: build/.filecoin-install] Error 2

[vmx]

From a side channel:

One option if you don't want this extra dep would be to check in bindgen.rs and not call bindgen in build.rs

I'd prefer if we just keep that dep.

[jennijuju]

thanks for the ticket!